diff options
| author | Matti Vaittinen <mazziesaccount@gmail.com> | 2022-10-03 11:12:04 +0300 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-11-23 19:44:03 +0000 |
| commit | 2cc64a23c4e26107887af23a62f8ba3c79ff7ab5 (patch) | |
| tree | 320d17e648f767d1da23082a30da636f5d080694 /include/linux/iio | |
| parent | 6abcb19e0a6a371b5dafe4473ea886a6891a5cd5 (diff) | |
iio: Add IIO_STATIC_CONST_DEVICE_ATTR
Add IIO_STATIC_CONST_DEVICE_ATTR macro for creating an read-only
iio_dev_attr which returns constant value. This macro is intended to be
used when replacing the IIO_CONST_ATTR - attributes for triggered
buffers because the triggered buffer attributes must be of type
iio_dev_attr.
Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com>
Link: https://lore.kernel.org/r/8dd853dd0ef8eb40cb980cc6f6e7a43166de3afb.1664782676.git.mazziesaccount@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'include/linux/iio')
| -rw-r--r-- | include/linux/iio/sysfs.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/iio/sysfs.h b/include/linux/iio/sysfs.h index e51fba66de4b..de5bb125815c 100644 --- a/include/linux/iio/sysfs.h +++ b/include/linux/iio/sysfs.h @@ -97,6 +97,17 @@ struct iio_const_attr { = { .string = _string, \ .dev_attr = __ATTR(_name, S_IRUGO, iio_read_const_attr, NULL)} +#define IIO_STATIC_CONST_DEVICE_ATTR(_name, _string) \ + static ssize_t iio_const_dev_attr_show_##_name( \ + struct device *dev, \ + struct device_attribute *attr, \ + char *buf) \ + { \ + return sysfs_emit(buf, "%s\n", _string); \ + } \ + static IIO_DEVICE_ATTR(_name, 0444, \ + iio_const_dev_attr_show_##_name, NULL, 0) + /* Generic attributes of onetype or another */ /** |